1/*
2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Copyright (C) 2005 Csaba Henk.
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 *
43 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 */
55
56#include <sys/cdefs.h>
| 1/*
2 * Copyright (c) 2007-2009 Google Inc. and Amit Singh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Copyright (C) 2005 Csaba Henk.
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 *
43 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 */
55
56#include <sys/cdefs.h>
|
58
59#include <sys/types.h>
60#include <sys/module.h>
61#include <sys/systm.h>
62#include <sys/errno.h>
63#include <sys/param.h>
64#include <sys/kernel.h>
65#include <sys/conf.h>
66#include <sys/uio.h>
67#include <sys/malloc.h>
68#include <sys/queue.h>
69#include <sys/lock.h>
70#include <sys/sx.h>
71#include <sys/mutex.h>
72#include <sys/proc.h>
73#include <sys/vnode.h>
74#include <sys/namei.h>
75#include <sys/mount.h>
76#include <sys/sysctl.h>
77#include <sys/fcntl.h>
78#include <sys/fnv_hash.h>
79#include <sys/priv.h>
80#include <security/mac/mac_framework.h>
81#include <vm/vm.h>
82#include <vm/vm_extern.h>
83
84#include "fuse.h"
85#include "fuse_node.h"
86#include "fuse_internal.h"
87#include "fuse_io.h"
88#include "fuse_ipc.h"
89
90#define FUSE_DEBUG_MODULE VNOPS
91#include "fuse_debug.h"
92
93MALLOC_DEFINE(M_FUSEVN, "fuse_vnode", "fuse vnode private data");
94
95static int fuse_node_count = 0;
96
97SYSCTL_INT(_vfs_fuse, OID_AUTO, node_count, CTLFLAG_RD,
98 &fuse_node_count, 0, "");
99
100int fuse_data_cache_enable = 1;
101
102SYSCTL_INT(_vfs_fuse, OID_AUTO, data_cache_enable, CTLFLAG_RW,
103 &fuse_data_cache_enable, 0, "");
104
105int fuse_data_cache_invalidate = 0;
106
107SYSCTL_INT(_vfs_fuse, OID_AUTO, data_cache_invalidate, CTLFLAG_RW,
108 &fuse_data_cache_invalidate, 0, "");
109
110int fuse_mmap_enable = 1;
111
112SYSCTL_INT(_vfs_fuse, OID_AUTO, mmap_enable, CTLFLAG_RW,
113 &fuse_mmap_enable, 0, "");
114
115int fuse_refresh_size = 0;
116
117SYSCTL_INT(_vfs_fuse, OID_AUTO, refresh_size, CTLFLAG_RW,
118 &fuse_refresh_size, 0, "");
119
120int fuse_sync_resize = 1;
121
122SYSCTL_INT(_vfs_fuse, OID_AUTO, sync_resize, CTLFLAG_RW,
123 &fuse_sync_resize, 0, "");
124
125int fuse_fix_broken_io = 0;
126
127SYSCTL_INT(_vfs_fuse, OID_AUTO, fix_broken_io, CTLFLAG_RW,
128 &fuse_fix_broken_io, 0, "");
129
130static void
131fuse_vnode_init(struct vnode *vp, struct fuse_vnode_data *fvdat,
132 uint64_t nodeid, enum vtype vtyp)
133{
134 int i;
135
136 fvdat->nid = nodeid;
137 if (nodeid == FUSE_ROOT_ID) {
138 vp->v_vflag |= VV_ROOT;
139 }
140 vp->v_type = vtyp;
141 vp->v_data = fvdat;
142
143 for (i = 0; i < FUFH_MAXTYPE; i++)
144 fvdat->fufh[i].fh_type = FUFH_INVALID;
145
146 atomic_add_acq_int(&fuse_node_count, 1);
147}
148
149void
150fuse_vnode_destroy(struct vnode *vp)
151{
152 struct fuse_vnode_data *fvdat = vp->v_data;
153
154 vp->v_data = NULL;
155 free(fvdat, M_FUSEVN);
156
157 atomic_subtract_acq_int(&fuse_node_count, 1);
158}
159
160static int
161fuse_vnode_cmp(struct vnode *vp, void *nidp)
162{
163 return (VTOI(vp) != *((uint64_t *)nidp));
164}
165
166static uint32_t __inline
167fuse_vnode_hash(uint64_t id)
168{
169 return (fnv_32_buf(&id, sizeof(id), FNV1_32_INIT));
170}
171
172static int
173fuse_vnode_alloc(struct mount *mp,
174 struct thread *td,
175 uint64_t nodeid,
176 enum vtype vtyp,
177 struct vnode **vpp)
178{
179 struct fuse_vnode_data *fvdat;
180 struct vnode *vp2;
181 int err = 0;
182
183 FS_DEBUG("been asked for vno #%ju\n", (uintmax_t)nodeid);
184
185 if (vtyp == VNON) {
186 return EINVAL;
187 }
188 *vpp = NULL;
189 err = vfs_hash_get(mp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE, td, vpp,
190 fuse_vnode_cmp, &nodeid);
191 if (err)
192 return (err);
193
194 if (*vpp) {
195 MPASS((*vpp)->v_type == vtyp && (*vpp)->v_data != NULL);
196 FS_DEBUG("vnode taken from hash\n");
197 return (0);
198 }
199 fvdat = malloc(sizeof(*fvdat), M_FUSEVN, M_WAITOK | M_ZERO);
200 err = getnewvnode("fuse", mp, &fuse_vnops, vpp);
201 if (err) {
202 free(fvdat, M_FUSEVN);
203 return (err);
204 }
205 lockmgr((*vpp)->v_vnlock, LK_EXCLUSIVE, NULL);
206 fuse_vnode_init(*vpp, fvdat, nodeid, vtyp);
207 err = insmntque(*vpp, mp);
208 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
209 if (err) {
210 free(fvdat, M_FUSEVN);
211 *vpp = NULL;
212 return (err);
213 }
214 err = vfs_hash_insert(*vpp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE,
215 td, &vp2, fuse_vnode_cmp, &nodeid);
216 if (err)
217 return (err);
218 if (vp2 != NULL) {
219 *vpp = vp2;
220 return (0);
221 }
222
223 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
224
225 return (0);
226}
227
228int
229fuse_vnode_get(struct mount *mp,
230 uint64_t nodeid,
231 struct vnode *dvp,
232 struct vnode **vpp,
233 struct componentname *cnp,
234 enum vtype vtyp)
235{
236 struct thread *td = (cnp != NULL ? cnp->cn_thread : curthread);
237 int err = 0;
238
239 debug_printf("dvp=%p\n", dvp);
240
241 err = fuse_vnode_alloc(mp, td, nodeid, vtyp, vpp);
242 if (err) {
243 return err;
244 }
245 if (dvp != NULL) {
246 MPASS((cnp->cn_flags & ISDOTDOT) == 0);
247 MPASS(!(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.'));
248 fuse_vnode_setparent(*vpp, dvp);
249 }
250 if (dvp != NULL && cnp != NULL && (cnp->cn_flags & MAKEENTRY) != 0) {
251 ASSERT_VOP_LOCKED(*vpp, "fuse_vnode_get");
252 ASSERT_VOP_LOCKED(dvp, "fuse_vnode_get");
253 cache_enter(dvp, *vpp, cnp);
254 }
255
256 /*
257 * In userland, libfuse uses cached lookups for dot and dotdot entries,
258 * thus it does not really bump the nlookup counter for forget.
259 * Follow the same semantic and avoid tu bump it in order to keep
260 * nlookup counters consistent.
261 */
262 if (cnp == NULL || ((cnp->cn_flags & ISDOTDOT) == 0 &&
263 (cnp->cn_namelen != 1 || cnp->cn_nameptr[0] != '.')))
264 VTOFUD(*vpp)->nlookup++;
265
266 return 0;
267}
268
269void
270fuse_vnode_open(struct vnode *vp, int32_t fuse_open_flags, struct thread *td)
271{
272 /*
273 * Funcation is called for every vnode open.
274 * Merge fuse_open_flags it may be 0
275 *
276 * XXXIP: Handle FOPEN_KEEP_CACHE
277 */
278 /*
279 * Ideally speaking, direct io should be enabled on
280 * fd's but do not see of any way of providing that
281 * this implementation.
282 *
283 * Also cannot think of a reason why would two
284 * different fd's on same vnode would like
285 * have DIRECT_IO turned on and off. But linux
286 * based implementation works on an fd not an
287 * inode and provides such a feature.
288 *
289 * XXXIP: Handle fd based DIRECT_IO
290 */
291 if (fuse_open_flags & FOPEN_DIRECT_IO) {
| 58
59#include <sys/types.h>
60#include <sys/module.h>
61#include <sys/systm.h>
62#include <sys/errno.h>
63#include <sys/param.h>
64#include <sys/kernel.h>
65#include <sys/conf.h>
66#include <sys/uio.h>
67#include <sys/malloc.h>
68#include <sys/queue.h>
69#include <sys/lock.h>
70#include <sys/sx.h>
71#include <sys/mutex.h>
72#include <sys/proc.h>
73#include <sys/vnode.h>
74#include <sys/namei.h>
75#include <sys/mount.h>
76#include <sys/sysctl.h>
77#include <sys/fcntl.h>
78#include <sys/fnv_hash.h>
79#include <sys/priv.h>
80#include <security/mac/mac_framework.h>
81#include <vm/vm.h>
82#include <vm/vm_extern.h>
83
84#include "fuse.h"
85#include "fuse_node.h"
86#include "fuse_internal.h"
87#include "fuse_io.h"
88#include "fuse_ipc.h"
89
90#define FUSE_DEBUG_MODULE VNOPS
91#include "fuse_debug.h"
92
93MALLOC_DEFINE(M_FUSEVN, "fuse_vnode", "fuse vnode private data");
94
95static int fuse_node_count = 0;
96
97SYSCTL_INT(_vfs_fuse, OID_AUTO, node_count, CTLFLAG_RD,
98 &fuse_node_count, 0, "");
99
100int fuse_data_cache_enable = 1;
101
102SYSCTL_INT(_vfs_fuse, OID_AUTO, data_cache_enable, CTLFLAG_RW,
103 &fuse_data_cache_enable, 0, "");
104
105int fuse_data_cache_invalidate = 0;
106
107SYSCTL_INT(_vfs_fuse, OID_AUTO, data_cache_invalidate, CTLFLAG_RW,
108 &fuse_data_cache_invalidate, 0, "");
109
110int fuse_mmap_enable = 1;
111
112SYSCTL_INT(_vfs_fuse, OID_AUTO, mmap_enable, CTLFLAG_RW,
113 &fuse_mmap_enable, 0, "");
114
115int fuse_refresh_size = 0;
116
117SYSCTL_INT(_vfs_fuse, OID_AUTO, refresh_size, CTLFLAG_RW,
118 &fuse_refresh_size, 0, "");
119
120int fuse_sync_resize = 1;
121
122SYSCTL_INT(_vfs_fuse, OID_AUTO, sync_resize, CTLFLAG_RW,
123 &fuse_sync_resize, 0, "");
124
125int fuse_fix_broken_io = 0;
126
127SYSCTL_INT(_vfs_fuse, OID_AUTO, fix_broken_io, CTLFLAG_RW,
128 &fuse_fix_broken_io, 0, "");
129
130static void
131fuse_vnode_init(struct vnode *vp, struct fuse_vnode_data *fvdat,
132 uint64_t nodeid, enum vtype vtyp)
133{
134 int i;
135
136 fvdat->nid = nodeid;
137 if (nodeid == FUSE_ROOT_ID) {
138 vp->v_vflag |= VV_ROOT;
139 }
140 vp->v_type = vtyp;
141 vp->v_data = fvdat;
142
143 for (i = 0; i < FUFH_MAXTYPE; i++)
144 fvdat->fufh[i].fh_type = FUFH_INVALID;
145
146 atomic_add_acq_int(&fuse_node_count, 1);
147}
148
149void
150fuse_vnode_destroy(struct vnode *vp)
151{
152 struct fuse_vnode_data *fvdat = vp->v_data;
153
154 vp->v_data = NULL;
155 free(fvdat, M_FUSEVN);
156
157 atomic_subtract_acq_int(&fuse_node_count, 1);
158}
159
160static int
161fuse_vnode_cmp(struct vnode *vp, void *nidp)
162{
163 return (VTOI(vp) != *((uint64_t *)nidp));
164}
165
166static uint32_t __inline
167fuse_vnode_hash(uint64_t id)
168{
169 return (fnv_32_buf(&id, sizeof(id), FNV1_32_INIT));
170}
171
172static int
173fuse_vnode_alloc(struct mount *mp,
174 struct thread *td,
175 uint64_t nodeid,
176 enum vtype vtyp,
177 struct vnode **vpp)
178{
179 struct fuse_vnode_data *fvdat;
180 struct vnode *vp2;
181 int err = 0;
182
183 FS_DEBUG("been asked for vno #%ju\n", (uintmax_t)nodeid);
184
185 if (vtyp == VNON) {
186 return EINVAL;
187 }
188 *vpp = NULL;
189 err = vfs_hash_get(mp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE, td, vpp,
190 fuse_vnode_cmp, &nodeid);
191 if (err)
192 return (err);
193
194 if (*vpp) {
195 MPASS((*vpp)->v_type == vtyp && (*vpp)->v_data != NULL);
196 FS_DEBUG("vnode taken from hash\n");
197 return (0);
198 }
199 fvdat = malloc(sizeof(*fvdat), M_FUSEVN, M_WAITOK | M_ZERO);
200 err = getnewvnode("fuse", mp, &fuse_vnops, vpp);
201 if (err) {
202 free(fvdat, M_FUSEVN);
203 return (err);
204 }
205 lockmgr((*vpp)->v_vnlock, LK_EXCLUSIVE, NULL);
206 fuse_vnode_init(*vpp, fvdat, nodeid, vtyp);
207 err = insmntque(*vpp, mp);
208 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
209 if (err) {
210 free(fvdat, M_FUSEVN);
211 *vpp = NULL;
212 return (err);
213 }
214 err = vfs_hash_insert(*vpp, fuse_vnode_hash(nodeid), LK_EXCLUSIVE,
215 td, &vp2, fuse_vnode_cmp, &nodeid);
216 if (err)
217 return (err);
218 if (vp2 != NULL) {
219 *vpp = vp2;
220 return (0);
221 }
222
223 ASSERT_VOP_ELOCKED(*vpp, "fuse_vnode_alloc");
224
225 return (0);
226}
227
228int
229fuse_vnode_get(struct mount *mp,
230 uint64_t nodeid,
231 struct vnode *dvp,
232 struct vnode **vpp,
233 struct componentname *cnp,
234 enum vtype vtyp)
235{
236 struct thread *td = (cnp != NULL ? cnp->cn_thread : curthread);
237 int err = 0;
238
239 debug_printf("dvp=%p\n", dvp);
240
241 err = fuse_vnode_alloc(mp, td, nodeid, vtyp, vpp);
242 if (err) {
243 return err;
244 }
245 if (dvp != NULL) {
246 MPASS((cnp->cn_flags & ISDOTDOT) == 0);
247 MPASS(!(cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.'));
248 fuse_vnode_setparent(*vpp, dvp);
249 }
250 if (dvp != NULL && cnp != NULL && (cnp->cn_flags & MAKEENTRY) != 0) {
251 ASSERT_VOP_LOCKED(*vpp, "fuse_vnode_get");
252 ASSERT_VOP_LOCKED(dvp, "fuse_vnode_get");
253 cache_enter(dvp, *vpp, cnp);
254 }
255
256 /*
257 * In userland, libfuse uses cached lookups for dot and dotdot entries,
258 * thus it does not really bump the nlookup counter for forget.
259 * Follow the same semantic and avoid tu bump it in order to keep
260 * nlookup counters consistent.
261 */
262 if (cnp == NULL || ((cnp->cn_flags & ISDOTDOT) == 0 &&
263 (cnp->cn_namelen != 1 || cnp->cn_nameptr[0] != '.')))
264 VTOFUD(*vpp)->nlookup++;
265
266 return 0;
267}
268
269void
270fuse_vnode_open(struct vnode *vp, int32_t fuse_open_flags, struct thread *td)
271{
272 /*
273 * Funcation is called for every vnode open.
274 * Merge fuse_open_flags it may be 0
275 *
276 * XXXIP: Handle FOPEN_KEEP_CACHE
277 */
278 /*
279 * Ideally speaking, direct io should be enabled on
280 * fd's but do not see of any way of providing that
281 * this implementation.
282 *
283 * Also cannot think of a reason why would two
284 * different fd's on same vnode would like
285 * have DIRECT_IO turned on and off. But linux
286 * based implementation works on an fd not an
287 * inode and provides such a feature.
288 *
289 * XXXIP: Handle fd based DIRECT_IO
290 */
291 if (fuse_open_flags & FOPEN_DIRECT_IO) {
|
293 } else {
294 VTOFUD(vp)->flag &= ~FN_DIRECTIO;
295 }
296
297 if (vnode_vtype(vp) == VREG) {
298 /* XXXIP prevent getattr, by using cached node size */
299 vnode_create_vobject(vp, 0, td);
300 }
301}
302
303int
304fuse_vnode_savesize(struct vnode *vp, struct ucred *cred)
305{
306 struct fuse_vnode_data *fvdat = VTOFUD(vp);
307 struct thread *td = curthread;
308 struct fuse_filehandle *fufh = NULL;
309 struct fuse_dispatcher fdi;
310 struct fuse_setattr_in *fsai;
311 int err = 0;
312
313 FS_DEBUG("inode=%ju size=%ju\n", (uintmax_t)VTOI(vp),
314 (uintmax_t)fvdat->filesize);
315 ASSERT_VOP_ELOCKED(vp, "fuse_io_extend");
316
317 if (fuse_isdeadfs(vp)) {
318 return EBADF;
319 }
320 if (vnode_vtype(vp) == VDIR) {
321 return EISDIR;
322 }
323 if (vfs_isrdonly(vnode_mount(vp))) {
324 return EROFS;
325 }
326 if (cred == NULL) {
327 cred = td->td_ucred;
328 }
329 fdisp_init(&fdi, sizeof(*fsai));
330 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred);
331 fsai = fdi.indata;
332 fsai->valid = 0;
333
334 /* Truncate to a new value. */
335 fsai->size = fvdat->filesize;
336 fsai->valid |= FATTR_SIZE;
337
338 fuse_filehandle_getrw(vp, FUFH_WRONLY, &fufh);
339 if (fufh) {
340 fsai->fh = fufh->fh_id;
341 fsai->valid |= FATTR_FH;
342 }
343 err = fdisp_wait_answ(&fdi);
344 fdisp_destroy(&fdi);
345 if (err == 0)
346 fvdat->flag &= ~FN_SIZECHANGE;
347
348 return err;
349}
350
351void
352fuse_vnode_refreshsize(struct vnode *vp, struct ucred *cred)
353{
354
355 struct fuse_vnode_data *fvdat = VTOFUD(vp);
356 struct vattr va;
357
358 if ((fvdat->flag & FN_SIZECHANGE) != 0 ||
359 (fuse_refresh_size == 0 && fvdat->filesize != 0))
360 return;
361
362 VOP_GETATTR(vp, &va, cred);
363 FS_DEBUG("refreshed file size: %jd\n", (intmax_t)VTOFUD(vp)->filesize);
364}
365
366int
367fuse_vnode_setsize(struct vnode *vp, struct ucred *cred, off_t newsize)
368{
369 struct fuse_vnode_data *fvdat = VTOFUD(vp);
370 off_t oldsize;
371 int err = 0;
372
373 FS_DEBUG("inode=%ju oldsize=%ju newsize=%ju\n",
374 (uintmax_t)VTOI(vp), (uintmax_t)fvdat->filesize,
375 (uintmax_t)newsize);
376 ASSERT_VOP_ELOCKED(vp, "fuse_vnode_setsize");
377
378 oldsize = fvdat->filesize;
379 fvdat->filesize = newsize;
380 fvdat->flag |= FN_SIZECHANGE;
381
382 if (newsize < oldsize) {
383 err = vtruncbuf(vp, cred, newsize, fuse_iosize(vp));
384 }
385 vnode_pager_setsize(vp, newsize);
386 return err;
387}
| 295 } else {
296 VTOFUD(vp)->flag &= ~FN_DIRECTIO;
297 }
298
299 if (vnode_vtype(vp) == VREG) {
300 /* XXXIP prevent getattr, by using cached node size */
301 vnode_create_vobject(vp, 0, td);
302 }
303}
304
305int
306fuse_vnode_savesize(struct vnode *vp, struct ucred *cred)
307{
308 struct fuse_vnode_data *fvdat = VTOFUD(vp);
309 struct thread *td = curthread;
310 struct fuse_filehandle *fufh = NULL;
311 struct fuse_dispatcher fdi;
312 struct fuse_setattr_in *fsai;
313 int err = 0;
314
315 FS_DEBUG("inode=%ju size=%ju\n", (uintmax_t)VTOI(vp),
316 (uintmax_t)fvdat->filesize);
317 ASSERT_VOP_ELOCKED(vp, "fuse_io_extend");
318
319 if (fuse_isdeadfs(vp)) {
320 return EBADF;
321 }
322 if (vnode_vtype(vp) == VDIR) {
323 return EISDIR;
324 }
325 if (vfs_isrdonly(vnode_mount(vp))) {
326 return EROFS;
327 }
328 if (cred == NULL) {
329 cred = td->td_ucred;
330 }
331 fdisp_init(&fdi, sizeof(*fsai));
332 fdisp_make_vp(&fdi, FUSE_SETATTR, vp, td, cred);
333 fsai = fdi.indata;
334 fsai->valid = 0;
335
336 /* Truncate to a new value. */
337 fsai->size = fvdat->filesize;
338 fsai->valid |= FATTR_SIZE;
339
340 fuse_filehandle_getrw(vp, FUFH_WRONLY, &fufh);
341 if (fufh) {
342 fsai->fh = fufh->fh_id;
343 fsai->valid |= FATTR_FH;
344 }
345 err = fdisp_wait_answ(&fdi);
346 fdisp_destroy(&fdi);
347 if (err == 0)
348 fvdat->flag &= ~FN_SIZECHANGE;
349
350 return err;
351}
352
353void
354fuse_vnode_refreshsize(struct vnode *vp, struct ucred *cred)
355{
356
357 struct fuse_vnode_data *fvdat = VTOFUD(vp);
358 struct vattr va;
359
360 if ((fvdat->flag & FN_SIZECHANGE) != 0 ||
361 (fuse_refresh_size == 0 && fvdat->filesize != 0))
362 return;
363
364 VOP_GETATTR(vp, &va, cred);
365 FS_DEBUG("refreshed file size: %jd\n", (intmax_t)VTOFUD(vp)->filesize);
366}
367
368int
369fuse_vnode_setsize(struct vnode *vp, struct ucred *cred, off_t newsize)
370{
371 struct fuse_vnode_data *fvdat = VTOFUD(vp);
372 off_t oldsize;
373 int err = 0;
374
375 FS_DEBUG("inode=%ju oldsize=%ju newsize=%ju\n",
376 (uintmax_t)VTOI(vp), (uintmax_t)fvdat->filesize,
377 (uintmax_t)newsize);
378 ASSERT_VOP_ELOCKED(vp, "fuse_vnode_setsize");
379
380 oldsize = fvdat->filesize;
381 fvdat->filesize = newsize;
382 fvdat->flag |= FN_SIZECHANGE;
383
384 if (newsize < oldsize) {
385 err = vtruncbuf(vp, cred, newsize, fuse_iosize(vp));
386 }
387 vnode_pager_setsize(vp, newsize);
388 return err;
389}
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